کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
444235 692950 2016 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Virtual code resource allocation for energy-aware MTC access over 5G systems
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر شبکه های کامپیوتری و ارتباطات
پیش نمایش صفحه اول مقاله
Virtual code resource allocation for energy-aware MTC access over 5G systems
چکیده انگلیسی

The enormous traffic of machine-type communications (MTC) expected over 5G exacerbates the limitations of access schemes currently under investigation in the literature. This scenario becomes more challenging when considering smart city environments, which introduce further issues due to the heterogeneity in the level of residual battery energy of involved machines. Novel solutions are, therefore, required, which aim at drastically reducing the collision probability of devices with critical level of residual battery energy. In this paper, we propose a virtual code resource allocation (VCRA) approach which extends the code-expanded strategy to support a high number of devices simultaneously accessing the system. Besides, a virtual resource allocation scheme to guarantee energy-priority in the access procedure is introduced. The idea behind our proposal is the definition of different access levels that exploit disjoint sets of access codewords, properly tailored to guarantee high capacity for each access level. Simulation results show to the effectiveness of our scheme in terms of (i) reducing the collision probability of machines with limited battery capabilities also in scenarios with very high cell load and (ii) enhancing the efficiency with respect to legacy code-expanded strategy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ad Hoc Networks - Volume 43, June 2016, Pages 3–15
نویسندگان
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